<html lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>copy</title>
<style type="text/css">
	body {background-color: white; color: black; font-family:sans-serif; font-size:medium;}
	a:link {color: #3300ff;}
	a:visited {color: #663399;}
	a:hover {color:#0099ff;}
	a:active {color: #0066cc;}
	a.button {text-decoration:none;}
	
	table.nav  {background-color: #dbddff;}
	table.body {margin-top:2ex; margin-bottom:2ex;}
	table.programlistingindent {margin-left:32px;}
	
	img { margin-bottom:0px; margin-top:0px;}
	tt {margin-left:0.5em; margin-right:0.5em; font-weight:lighter;}
	
	p {margin-top:0ex;}
	p.synopsis {margin-left:32px;}
	p.programlistingindent {margin-left:32px;}
	p.citetitle {margin-left:2em;}
	
	ul ul {list-style-type:square;}
	ul li p {margin-top:0ex; margin-bottom:.5ex; padding:0}
	ol li p {margin-top:0ex; margin-bottom:.5ex; padding:0}
	
	h1.reftitle {color:#a90000;}
	h1.reftitle {font-size:3.7ex; margin-top:0; margin-bottom:0; font-weight:bold}
	h1.title {color:black; font-size:4ex; margin-top:1ex; font-weight:bold}
	h2.title {color:#bd0000; margin-top:1ex; margin-bottom:.9ex; font-weight:bold; font-size:3ex}
	h3.title {color:#bd0000; margin-top:1ex; margin-bottom:.9ex; font-weight:bold; font-size:2.5ex}
	h4.title {color:#bd0000; margin-top:1ex; margin-bottom:.9ex; font-weight:bold; font-size:2ex}
	h2 {color:#bd0000; margin-top:1ex; margin-bottom:.9ex; font-weight:bold; font-size:2.5ex}
	h3 {color:#bd0000; margin-top:1ex; margin-bottom:.9ex; font-weight:bold; font-size:2ex} 
	
	pre.programlisting {margin-left:32px;}
	pre.synopsis {margin-left:32px;}
	
	
	.categorytitle {margin-top:8px; padding-top:0px;}
	.categorylist {background-color: #e1e6f2;}
 	</style>
</head>
<body>
<a name="top_of_page"></a><p style="font-size:1px;"></p>
<h1 class="reftitle">copy</h1>
<h2>Purpose</h2>
<p>Create a copy of an object derived from the ConvexSet class.</p>
<h2>Syntax</h2>
<pre class="synopsis">Snew = S.copy</pre>
<pre class="synopsis">Snew = copy(S)</pre>
<h2>Description</h2>
<p></p>
        Create a copy of a set <tt>S</tt> and return a new object <tt>Snew</tt> with same properties as the original set.
        Changing one object does not affect the second one because the objects are not connected by reference. <br><br>        
        Note that this method is different versus the equality assignment <tt>Snew = S</tt> which points to the same object.
        See the example for explanation.
    <h2>Input Arguments</h2>
<table cellspacing="0" class="body" cellpadding="4" border="0" width="100%">
<colgroup>
<col width="31%">
<col width="69%">
</colgroup>
<tbody><tr valign="top">
<td><tt>S</tt></td>
<td>
<p></p>Any object derived from the <tt>ConvexSet</tt> class, e.g. <tt>Polyhedron</tt>, <tt>YSet</tt>, ...<p>
	    		Class: <tt>ConvexSet</tt></p>
</td>
</tr></tbody>
</table>
<h2>Output Arguments</h2>
<table cellspacing="0" class="body" cellpadding="4" border="0" width="100%">
<colgroup>
<col width="31%">
<col width="69%">
</colgroup>
<tbody><tr valign="top">
<td><tt>Snew</tt></td>
<td>
<p></p>New object which is an exact copy of the set <tt>S</tt>.<p>
	    		Class: <tt>ConvexSet</tt></p>
</td>
</tr></tbody>
</table>
<h2>Example(s)</h2>
<h3>Example 
				1</h3> Create a random polyhedron in V-representation. <pre class="programlisting"> P=ExamplePoly.randVrep </pre>
<pre class="programlisting">Polyhedron in R^2 with representations:
    H-rep               : Unknown (call computeHRep() to compute)
    V-rep (redundant)   : Vertices  10 | Rays   0
Functions : none
</pre> Create a new object <tt>Pnew</tt> that is a copy of the set <tt>P</tt>. <pre class="programlisting"> Pnew = P.copy </pre>
<pre class="programlisting">Polyhedron in R^2 with representations:
    H-rep               : Unknown (call computeHRep() to compute)
    V-rep (redundant)   : Vertices  10 | Rays   0
Functions : none
</pre> If we do any change on the new polyhedron <tt>Pnew</tt>, this will not affect the original polyhedron.  For instance, we can convert it to H-representation: <pre class="programlisting"> Pnew.H; </pre>
<pre class="programlisting"></pre>
<pre class="programlisting"> Pnew.hasHRep </pre>
<pre class="programlisting">
ans =

     1

</pre> The original polyhedron <tt>P</tt> remains in V-representation <pre class="programlisting"> P.hasHRep </pre>
<pre class="programlisting">
ans =

     0

</pre> The different story is when a new object is a reference of the original set.  This is achieved by equality assignment: <pre class="programlisting"> Q = P; </pre>
<pre class="programlisting"></pre> When the polyhedron <tt>Q</tt> is changed, this also affects the original polyhedron <pre class="programlisting"> Q.H; </pre>
<pre class="programlisting"></pre>
<pre class="programlisting"> Q.hasHRep </pre>
<pre class="programlisting">
ans =

     1

</pre>
<pre class="programlisting"> P.hasHRep </pre>
<pre class="programlisting">
ans =

     1

</pre>
<h2>See Also</h2>
<a href="../@YSet/yset.html">yset</a>, <a href="../@Polyhedron/polyhedron.html">polyhedron</a><p></p>
<table class="nav" summary="Navigation aid" border="0" width="100%" cellpadding="0" cellspacing="0"><tr valign="top">
<td align="left" width="20">
<a href="affinehull.html" class="button">&#9664;</a>  </td>
<td align="left">affinehull</td>
<td>  </td>
<td align="right">plot</td>
<td align="right" width="20"><a href="plot.html" class="button">&#9654;</a></td>
</tr></table>
<br><p>©  <b>2003-2013</b>     Michal Kvasnica: STU Bratislava,    <a href="mailto:michal.kvasnica@stuba.sk">michal.kvasnica@stuba.sk</a></p>
<p>©  <b>2010-2013</b>     Martin Herceg: ETH Zurich,    <a href="mailto:herceg@control.ee.ethz.ch">herceg@control.ee.ethz.ch</a></p>
</body>
</html>
